Sash-cord guide



F. s. GLARKSON. Sash-00rd Guide.

No'. 225,969 Patented Mar. 30, 1880.

N-PETERS, NOI'D-LJTHOGAPHER, WASHINGTQN, DAC.

YNrTnn STATES FRANK S. GLARKSON, 0F BALTIMORE, MARYLAND.

SASH-CORD GUIDE.

SPECIFICATION formingpart of Letters Patent No. 225,969, dated March 30, 1880.

Application filed December 23, 1'879.

To all whom it may concern:

Be it known that I, FRANK S. GLARKsoN, of Baltimore city, State of Maryland, haveinvented certain new and useful Improvements in Sash-Gord Guides; and I hereby declare the same to be fully, clearly, and exactly described as follows, reference being had to the accompanying drawings, in Which- Figure l is aperspective view of the device; Fig. 2, a plan View of the yoke or holder.

The object of my invention is to furnish a sash-cord guide which shall be far cheaper in construction than those in use, while, as incidental to its peculiar constructionincreased facility is afforded for inserting it in the window-frame; and it consists, essentially, in the substitution for the usual casing of a simple yoke in which the sheave is pivoted, as hereinafter set forth.

In the accompanying drawings, A is the sheave, having a pivot-pin, C, as usual. B is a yoke crossing the sheaveat b sufficiently close to retain the rope in the groove, while admitting of the free revolution of the sheave. This yoke is provided with segmental flanges c o, which may be perforated for securingscrews; but by preference the sides of the yoke are somewhat roughened or barbed, so that when driven into the window-frame the device is securely retained.

The sides of the yoke are curved in the arc of a circle about its longitudinal axis, and each is provided with a slot, a, for the pivot-pin G.

To insert the device in a window-frame, a hole is bored of the size ofthe yoke B by means of a bit, which has, at the proper distance from its point, a second cutter, which sinks a recess for the flange c, as will be readily understood. sheave, crossing the hole for the yoke, and the frame is ready for the insertion of the device. This is accomplished by simply inserting the sheave in the yoke and driving the latterinto the hole until the flan ge e is flush with the window-frame. n

The advantages of the device over the usual sash-cord guide are evident. It does away with the cumbrous casin g, which had to be carefully tted into a mortise in the frame, and substitutes for it a light and simple yoke separable from the shea've and of such construction as to admit of its insertion with the minimurn expenditure of time and labor.

What I claim is- A sash-cord guide consisting of a sheave pivoted within or upon a yoke which crosses the rear side of the sheave, and Whose exterior walls are cylindrical, as set forth.

FRANK S. ULARKSON.

Witnesses R. D. WILLIAMS, W. A. BERTRAM.

A mortise is made for the 

